我的代码有一个非常奇怪的错误。实际上，根本没有错误，只是调试器以“程序收到信号:“EXC_BAD_ACCESS””消息开始。
谁能帮我？我绝对感到困惑...谢谢。
-(NSString *)fullNameForPhone:(NSString *)ph withAlternativeText:(NSString *)text
{
ABAddressBookRef addressBookRef = ABAddressBookCreate();
NSLog(@"create addressBookRef");
NSString *stringToReturn = text;
CFArrayRef allPeopleRef = ABAddressBookCopyArrayOfAllPeople(addressBookRef);
NSLog(@"create allPeopleRef");
CFIndex nPeople = ABAddressBookGetPersonCount(addressBookRef);
int i = 0;
BOOL nameFound = NO;
while ((i < nPeople) && (!nameFound))
{
ABRecordRef recordRef = CFArrayGetValueAtIndex(allPeopleRef, i);
NSLog(@" create recordRef");
CFStringRef allRecordPhonesRef = ABRecordCopyValue(recordRef, kABPersonPhoneProperty);
NSLog(@" create allRecordPhonesRef");
CFIndex nPhones = ABMultiValueGetCount(allRecordPhonesRef);
int currentPhone = 0;
for (currentPhone = 0; currentPhone < nPhones; currentPhone++)
{
CFStringRef currentPhoneNumberRef = ABMultiValueCopyValueAtIndex(allRecordPhonesRef, currentPhone);
NSLog(@" create currentPhoneNumberRef");
NSString *currentCleanPhoneNumber = [self cleanPhoneNumberForString:[NSString stringWithFormat:@"%@", currentPhoneNumberRef]];
if (currentPhoneNumberRef!=NULL)
{
NSLog(@" release currentPhoneNumberRef");
CFRelease(currentPhoneNumberRef);
}
if ([ph isEqualToString:currentCleanPhoneNumber])
{
CFStringRef firstName = ABRecordCopyValue(recordRef, kABPersonFirstNameProperty);
CFStringRef lastName = ABRecordCopyValue(recordRef, kABPersonLastNameProperty);
NSString *fullName = [self fullNameForFirstName:[NSString stringWithFormat:@"%@", firstName]
andLastName:[NSString stringWithFormat:@"%@", lastName]];
if (firstName != NULL)
CFRelease(firstName);
if (lastName != NULL)
CFRelease(lastName);
stringToReturn = fullName;
nameFound = YES;
break;
}
}
CFRelease(allRecordPhonesRef);
NSLog(@" release allRecordPhonesRef");
CFRelease(recordRef);
NSLog(@" release recordRef");
i++;
}
CFRelease(allPeopleRef);
NSLog(@"release allPeopleRef");
CFRelease(addressBookRef);
NSLog(@"release addressBookRef");
return stringToReturn;
}
控制台输出为:
2009-07-31 00:20:05.230 abmodular[21747:20b] create addressBookRef
2009-07-31 00:20:05.231 abmodular[21747:20b] create allPeopleRef
2009-07-31 00:20:05.231 abmodular[21747:20b] create recordRef
2009-07-31 00:20:05.232 abmodular[21747:20b] create allRecordPhonesRef
2009-07-31 00:20:05.232 abmodular[21747:20b] create currentPhoneNumberRef
2009-07-31 00:20:05.232 abmodular[21747:20b] release currentPhoneNumberRef
2009-07-31 00:20:05.232 abmodular[21747:20b] create currentPhoneNumberRef
2009-07-31 00:20:05.233 abmodular[21747:20b] release currentPhoneNumberRef
2009-07-31 00:20:05.233 abmodular[21747:20b] release allRecordPhonesRef
2009-07-31 00:20:05.233 abmodular[21747:20b] release recordRef
2009-07-31 00:20:05.233 abmodular[21747:20b] create recordRef
2009-07-31 00:20:05.234 abmodular[21747:20b] create allRecordPhonesRef
2009-07-31 00:20:05.234 abmodular[21747:20b] create currentPhoneNumberRef
2009-07-31 00:20:05.234 abmodular[21747:20b] release currentPhoneNumberRef
2009-07-31 00:20:05.234 abmodular[21747:20b] release allRecordPhonesRef
2009-07-31 00:20:05.235 abmodular[21747:20b] release recordRef
2009-07-31 00:20:05.235 abmodular[21747:20b] release allPeopleRef
[Session started at 2009-07-31 00:20:05 +0400.]
GNU gdb 6.3.50-20050815 (Apple version gdb-966)
....
Attaching to process 21747.
kill
quit
The Debugger has exited with status 0.(gdb)
按继续输出“EXC_BAD_ACCESS”消息。 Xcode显示，我代码中最新执行的字符串是
CFRelease(addressBookRef); 最佳答案
我在做类似的事情时遇到了同样的问题，经过进一步的研究，我发现我已经发布了。根据Core Foundation docs:
我的意思是，您不应释放带有Get字样的功能。如果这样做，它将在以后的真实所有者尝试释放它时引起问题。因此，在这种情况下，当您执行以下操作时:
ABRecordRef recordRef = CFArrayGetValueAtIndex(allPeopleRef, i);
然后:
CFRelease(recordRef);
您正在发布不应发布的内容。很久以后，您执行以下操作:
CFRelease(allPeopleRef);
阵列将尝试释放所有记录，但不知道您已经释放了其中的一些记录。结果是您的错误。通过注释掉该行，您可能使错误消失了，但是我担心您造成了内存泄漏。
我建议您不要在Get方法指针上调用
CFRelease，而应在Create或Copy方法指针上调用它(此规则可能有异常(exception)，但到目前为止对我有用)。关于iPhone SDK : EXC_BAD_ACCESS with CFRelease for ABAddressBookRef，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/1209130/